Xah'Rith

Xah'Rith is the keywarden that appears in Act III in the catapult section of Stonefort. The key that he can drop is called the Key of Terror. Xah'Rith looks like a very large Morlu Incinerator and he is described as "Tormentor of the Damned". Morlu Incinerators are Act IV monsters that float around, teleport, cast falling meteors and when you get too close they push you away with a fiery burst. Xah'Rith moves around and teleports like the morlu incinerators but his attacks are different.

Originally, Xah-Rith had the Illusionist and Fast affixes. Blizzard removed those affixes in a hot fix released on October 24th, 2012 (soon after patch 1.0.5) due to complaints from the community about Xah-Rith's difficulty. The changes they made are as follows:

He can no longer spawn with the Illusionist or Fast affix.

Damage dealt by a number of his abilities has been reduced.

The movement speed reduction applied by his Cold attacks has been reduced.

His size has been slightly reduced.

The only affix that Xah'Rith currently has is the Teleporter affix.

Xah-Rith's attacks are different from his morlu incinerator cousins in the following ways. Instead of calling down fiery meteors from the sky, Xah'Rith summons a rain of frozen corpses. The corpses do damage when they hit you and your movement speed will be slowed if you are inside the area of affect that is shown on the ground. Instead of a fiery burst that will push you away when you are too close, Xah'Rith will hit you with a frozen cloud.

Ever since Xah-Rith was nerfed he has become much easier to kill. None of his attacks do a lot of damage, so if you are having trouble surviving them you should probably decrease your Monster Power level.

He does like teleport a lot so you should try to freeze or stun him so that you can land some good attacks. If you get close to him (melee range) he will try to push you away but you can just run back to him and try again.

After fighting him a few times you will begin to learn how to avoid the brunt of the falling frozen corpse attack. Just run to edge of the area marked on the ground and you should be fine.